When I left my first real job, I was feeling I had been treated poorly, and it reflected in my using the password "L1ke-A-d09" for the last month of my tenure. It did not help me feel calmer but it allowed me not to burn bridges that proved useful later in life.
And sometimes I change passwords to reflect other moods, like when I fell in love or got wed.
Do you tend to use passwords reflecting your mood?
Or do you have a "system". (Which could make it easier for them to be cracked by the way, however complex the system. If you do, DON'T share the system itself...)